Filled bobbin



Jan. 21, 1969 c. c. BELL 3,423,046

FILLED BOBBIN Filed Sept. 22, 1967 INVENTOR. CHARLES C. BELL BY WWW/7M 'MhY M ATTORNEYS United States Patent M 3,423,046 FILLED BOBBHN Charles C. Bell, Warwick, R.l., assignor to Leesona Corporation, Warwick, RJL, a corporation of Massachusetts Filed Sept. 22, 1967, Ser. No. 669,817

US. Cl. 242-164 Int. Cl. B6511 55/00 1 Claim ABSTRACT OF THE DISCLOSURE This invention relates to a yarn package and, more particularly, to such a package in which the outer end of a strand of yarn wound on the package is formed into a bunch releasably retained in a hollow core of the package.

As used herein the term package means an article, such as a bobbin, having a body of yarn or other strand material wound so that it may be moved from place to place. The term yarn is employed in a general sense to apply to all kinds of strand material either textile or otherwise.

Various expedients are known in the textile industry for positioning the tailing or unwinding end of a strand of yarn on a bobbin or other package, so that the end may be retrieved for later use. A common expedient is to wind tailing coils about the core of the bobbin. It has also been proposed to pass the unwinding end into the bobbin either in a lineal fashion or in some sort of a bunch of yarn. Such a hunch is shown as a coil received in a hollow core of a bobbin in US. Patents Nos. 1,011,- 969 and 1,029,020, granted in 1911 and 1912, respectively. This latter expedient has apparently received little, if any, commercial acceptance, possibly because the coils would fall out of the bobbin core. The provision of a single lineal strand of the unwinding end positioned in the hollow core is an improvement over the coil expedient shown in the previously mentioned patents, in that a single strand extending through the core is less likely to fall out, but retrieval of a single strand is diflicult and has received little commercial acceptance. The common method of retaining the unwinding end on the bobbin is to wind it about the core.

The present invention is, in brief, directed to an improved manner of more securely retaining the unwinding end on a bobbin while facilitating substantially easier and more reliable retrieval of the unwinding end when the bobbin is used on automatic threading winding machines. More particularly, the unwinding end is formed into a bunch which is retained in a hollow core of the bobbin by frictional holding engagement of the bunch with the core.

It is a primary object of this invention to provide a new and improved yarn package.

Another object is provision of such a new and improved yarn package having a hollow core which receives the unwinding end of the strand of yarn in the form of a bunch urged into frictional holding engagement with the core to releasably retain the bunch in the core.

Patented Jan. 21, 1969 These and other objects and advantages of the invention will be apparent from the following description and the accompanying drawings, in which:

FIG. 1 is a longitudinal sectional view of an embodiment of the invention applied to one type of bobbin; and

FIG. 2 is a view similar to FIG. 1 with the invention applied to another type of bobbin.

Referring to FIG. 1 of the drawings, a filled bobbin 10 has a hollow core 12 with a perforate or porous partition 14 extending completely across the hollow and secured to the core 12 near the tip end 16 thereof. A strand of yarn is wound about the core 12 to form a body of yarn 18 and has a free outer, or unwinding end 20 formed into a bunch 22 received in a chamber 24 in the hollow core above the partition 14. This bunch of yarn 22 is formed in the chamber 24 by applying vacuum to a lower end 26 of the core 12 and drawing the unwinding end 20 into the chamber. It should be noted that in forming the bunch 22, a sufficiently low vacuum may be applied to the lower end 26 of the hollow core 12 to provide an adequately rapid fiuid flow through the partition 14 so that the unwinding end 20 whips about as it is formed into the bunch 22 in the chamber 24 and in its formation is compressed. The inherent resiliency of the yarn urges the bunch into sufliciently tight frictional engagement with the cylindrical surface of the chamber 24 to releasably retain the bunch in the chamber. An inwardly directed annular flange 28 at the tip 16 of the core may be provided, if desired, to further aid in retaining the compressed bunch 22 in the core.

With reference to FIG. 2, a bobbin 30 having a hollow frusto-conical core 32 is shown with a strand of yarn wound on the core to form a body of yarn 34 having an unwinding end 36 formed into a bunch 38 received in the hollow core 32 in frictional holding engagement with the core to releasably retain the bunch 38 in the core. The manner in which the bunch may be formed and deposited in the core is fully described in a copending US. patent application Ser. No. 667,500, filed Sept. 13, 1967, and entitled Bobbin Handling, by John Nelson, Thomas E. Pitts, and William E. Stoppard. As described therein, the bunch 38 is initially formed as loops at least twice the diameter of the hollow in the core 32 and these loops are then compressed and inserted into the core so that they expand and the bunched yarn resiliently engages the inner surface of the core to frictionally retain the bunch in the core for subsequent retrieval.

While this invention has been described with reference to particular embodiments in a particular environment, various changes may be apparent to one skilled in the art and the invention is therefore not to be limited to such environment or embodiments except as set forth in the appended claim.

What is claimed is:

1. A package of yarn, comprising means defining a hollow core, a strand of yarn wound about said core, said strand having a free outer end in the form of a compressed bunch received in said core in resilient frictional holding engagement with said core to releasably retain the bunch in the core.

References Cited UNITED STATES PATENTS 1,011,969 1 2/1911 Koechlin 139-257 1,029,020 6/1912 Marazzi 242- 1,088,824 3/1914 Koechlin 139-257 STANLEY N. GILREATH, Primary Examiner. 

